Plastic Material Bird Spike Spike Kits, 3.6M/11.8Ft. 12 Pieces, 30 Cm Long / Piece. Does Not Contain Glue. The Flexible Base Of The Spike Can Bend 360 Degrees Allowing More Available Options Of Surfaces To Be Used. Durable And Long-Lasting Material: The Bird Nails Are Made From High Quality Materials , With Fine Workmanship, Waterproof Outside, Beautiful And Practical. So The Bird Repellent Pigeon Repellent Kit Will Last For Many Years Without Maintenance. Effective: The Kit Is Suitable For Different Types Of Pest Birds Such As Pigeons, Sparrows, Starlings, Swallows, Crows, Blackbirds, Seagulls, And Even Climbing Animals Etc. They Act As A Visual And Physical Deterrent. It Can Prevent Birds Or Habitats From Staying On Walls Or Chimneys, Frolicking And Nesting. These Bird Deterrents Can Also Prevent Thieves And Other Intruders From Climbing Over Your Fence. Easy Installation: For Permanent Placement, You Can Use Zip Ties, Screws, Adhesives Or Nails To Nail These Anti-Bird Nails. Compared To Other Bird Repellents, These Bird Spikes Require Little To No Maintenance For Pigeons And Other Small Birds. Versatile Use: The Spikes Can Be Installed Along Raised Areas, Ideal For Balconies, Roofs, Barn Rafters, Commercial Signs, Patios, Parking Lots, Chimneys, Gazebos, Even Near Hard Drive Tv Antennas (No Rf Interference), Towers, Valves, Landings, Support Structures, Posts, Walkways, Curved Surfaces Or Areas Contaminated With Bird Droppings.